//WeatherAppDlg.cpp
typedef double ( __cdecl *CalculateWeatherfunptr) ();
CalculateWeatherfunptr LibEntryPoint;
HINSTANCE dllHandle;
HANDLE threadHandle;
int city;
//these are my global variables

BOOL CWeatherAppDlg::OnInitDialog()
{
    CDialog::OnInitDialog();
    dllHandle = LoadLibrary("C:\Users\1337832\Documents\Visual Studio 2005\Projects\WeatherApp\debug\Project1DLL.dll");
    if(dllHandle != 0)
        cout<<"DLL found";
    else
        cout<<"DLL not found";
//loading the dll

void CWeatherAppDlg::OnBnClickedPuneBtn()
 {
 city=1;
 LibEntryPoint = (CalculateWeatherfunptr)GetProcAddress(dllHandle,"CalculateWeatherPune");
 threadHandle = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)myFunctionCaller,this,0,0);
 }

 void CWeatherAppDlg::OnBnClickedMumbaiBtn()
 {
 city=2;
 LibEntryPoint = (CalculateWeatherfunptr)GetProcAddress(dllHandle,"CalculateWeatherMumbai");
 threadHandle = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)myFunctionCaller,this,0,0);

 }

  void CWeatherAppDlg::OnBnClickedDelhiBtn()
 {
 city=3;
 LibEntryPoint = (CalculateWeatherfunptr)GetProcAddress(dllHandle,"CalculateWeatherDelhi");
 threadHandle = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)myFunctionCaller,this,0,0);
 }


 void CWeatherAppDlg::OnBnClickedBangaloreBtn()
 {
 city=4;
 LibEntryPoint = (CalculateWeatherfunptr)GetProcAddress(dllHandle,"CalculateWeatherBangalore");
 threadHandle = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)myFunctionCaller,this,0,0);
 }

DWORD WINAPI CWeatherAppDlg::Display()
{
    CString str1;
    double temp;
    while(1){
        switch(city){
            case 1:
                    temp = LibEntryPoint();
                    Sleep(2000);
                    str1.Format(_T("%f"),temp);
                    m_puneControl.SetWindowText(str1);
                    m_puneControl.RedrawWindow();
                    break;
            case 2:
                    temp = LibEntryPoint();
                    Sleep(2000);

                    str1.Format(_T("%f"),temp);
                    m_mumbaiControl.SetWindowText(str1);
                    m_mumbaiControl.RedrawWindow();
                    break;
            case 3:
                    temp = LibEntryPoint();
                    Sleep(2000);
                    str1.Format(_T("%f"),temp);
                    m_delhiControl.SetWindowText(str1);
                    m_delhiControl.RedrawWindow();
                    break;
            case 4:
                    temp = LibEntryPoint();
                    Sleep(2000);
                    str1.Format(_T("%f"),temp);
                    m_bangaloreControl.SetWindowText(str1);
                    m_bangaloreControl.RedrawWindow();
                    break;
            default : cout<<"case does not match";
        }
    }
    return 0;
 }
 DWORD WINAPI CWeatherAppDlg::myFunctionCaller(LPVOID* param)
{
  CWeatherAppDlg *classPtr = (CWeatherAppDlg*)param;
  classPtr->Display();
  return 0;
}